Oxygen Sensor There are actually (4) O2 sensors on your truck. If you look inside the wheel wells behind the fender liner, right about where the frame is one O2 sensor, the other is underneath the truck about half way back in relation to the transmission. If you see where the exhaust joints together, you went about 6" too far.
When you start looking at the O2 sensors, they are normally numbered something like "Bank 1 Sensor 1" Bank 1 is on the passenger side; Bank 2 is on the driver's side. Sensor 1 is the upstream sensor (near the frame, between the block and the cat) and Sensor 2 is near the Y-pipe (downstream of the cat).
Normally it is the upstream sensors (sensor 1) that go first. They see the harshest conditions. You will need; Oxygen Sensor Socket Anti-Seized Penetrating Oil Sometimes it will take 15 minutes or take a few hours it depends on your luck… ---------------------------------------------- Copy and paste link below for more info. www.aa1car.com/library/ford_lean_codes.htm
2000 ford lightning. P1540,po171.po174
No , fuel injected
In a 2000 Ford Expedition : Either the 4.6 liter / 281 cubic inch V8 engine or the 5.4 liter / 330 cubic inch V8 engine ( from the factory )
Bank 2 is the drivers side of the engine on your 2000 4.6 liter Ford Expedition
The engine crank shaft is inside the engine
For a 2000 Ford Expedition : The 4.6 liter V8 engine uses the ( 4R70W ) The 5.4 liter V8 engine uses the ( 4R100 )
Bank 2 is the drivers side of the engine in a Ford Expedition
According to the 2000 Ford Expedition Owner Guide ( 5W-30 ) * with engine oil filter change , 6.0 U.S. quarts of 5W-30 engine oil
po343 is camshaft sensor 1 bad and po171 is bank1 sensor bad, in English po343 cam sensor is mounted on back of engine and hard to get to, the po171 is bank 1 o2 sensor easy to replace.
On a 2000 Ford Expedition : In the Power Distribution Box ( which is " live " ) located in the engine compartment , on the drivers side of the engine compartment ( relay # 301 is the fuel pump relay )
According to the 2000 Ford Expedition Owner Guide : With engine oil filter change : Both the 4.6 and the 5.4 take ( 5.7 liters / 6.0 U.S. quarts of 5W-30 )
260 horsepower